Elaine said... Positives: scenery, nice/safe driver
Negatives: stops on way a bit touristy (i.e. Everyone get out and walk around for 10 minutes) and since all the tour buses stop at the same places around the same times, it wasn't very peaceful. It is also a long drive.
What would I do differently?: (A) spend one night by the sound, drive myself; (B) take the helicopter back (Disclaimer: I generally hate group tours, so if you like them, you will probably love this trip!)